package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * @author zero
 * @date 2020/5/31
 */
@Component
public class SpringSecurityUserService implements UserDetailsService {

    @Reference
    private UserService userService;

    /**
     *根据用户名查询用户信息
     * @param username
     * @return
     * @throws UsernameNotFoundException
     */
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {

        User user = userService.findUserByName(username);
        if (user == null){
            return null;
        }
        Set<Role> roles = user.getRoles();
        //创建集合,存储权限和角色
        List<GrantedAuthority> list = new ArrayList<>();
        if (roles != null && roles.size() > 0){
            for (Role role : roles) {
                //存储角色信息
                list.add(new SimpleGrantedAuthority(role.getKeyword()));
                Set<Permission> permissions = role.getPermissions();
                if (permissions != null && permissions.size() > 0){
                    for (Permission permission : permissions) {
                        //用于存储权限信息
                        list.add(new SimpleGrantedAuthority(permission.getKeyword()));
                    }
                }
            }
        }
        //返回框架用户对象
        return new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
    }
}
